I just merged in my -fdicts-strict work, so I was deleting the old branch… but it's rejected for some reason.

$ git push origin --delete dicts-strict

remote: performing tab-check...

remote: + refs/heads/dicts-strict ghc <my-username> DENIED by fallthru

remote: error: hook declined to update refs/heads/dicts-strict

To ssh://git@git.haskell.org/ghc.git

 ! [remote rejected] dicts-strict (hook declined)

error: failed to push some refs to 'ssh://git@git.haskell.org/ghc.git'

Git gurus chime in? Thanks.